<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
 <style>
   .father {
 width: 200px;
 height: 200px;
 border: 1px solid #000;
 position: relative; 
}
.father .one {
  width: 50px;
  height: 50px;
  background-color: aqua;
  position: absolute;
  right: 0vw;
}
.father .two {
  width: 50px;
  height: 50px;
  background-color: rebeccapurple;
  position: absolute;
  bottom: 0vw;
}
 </style>
</head>
<body>
  <div class="father">
    <div class="one">一</div>
    <div class="two">二</div>
  </div>
</body>
</html>